On the basis of analyzing the degeneration evolution of ecological environment in key sandy area of north and middle Ningxia,the main contents,methods and technological route for comprehensive control of land desertification in the sandy area by biological engineering technical measures were discussed.Some specific studies were made on the application of pulp waste solution development and sand fixation greening technology in desertification control,circular economy sand control afforestation mode based on papermaking waste sludge utilization,introduction and screening of excellent tree species in the sandy area and stress resistance evaluation and technical measures of water-saving irrigation in sandy area,so as to provide a scientific basis for comprehensive control of land desertification in sandy area.%在分析宁夏中北部重点风沙区生态环境退化演变的基础上,首先论述了通过生物工程技术措施综合治理风沙区沙化土地的主要内容、方法及技术路线,然后具体研究了纸浆废液开发及固沙绿化技术在防沙治沙中的应用,分析了基于“造纸废泥”利用的循环经济型治沙造林模式、风沙区优良树种的引种筛选及抗逆性评价、风沙区的节水灌溉技术措施,旨在为风沙区沙化土地综合治理提供科学依据.
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